When: Feb. 11.
Best of the U.S.: Keri Herman, Devin Logan, Julia Krass and Maggie Voisin.
Best of the rest: Canadians Kaya Turski and Dara Howell.
U.S. chances to medal: Herman, the former hockey player turned extreme sports star, appears to have the best shot to make the podium.
Little-known fact: Voisin, who turned 15 in December, will be the youngest member of Team USA at the Games.